Module: Inflector

Extended by:
Inflector
Included in:
Inflector
Defined in:
lib/active_record/support/inflector.rb

Overview

The Inflector transforms words from singular to plural, class names to table names, modulized class names to ones without, and class names to foreign keys.

Instance Method Summary collapse

Instance Method Details

#camelize(lower_case_and_underscored_word) ⇒ Object 



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# File 'lib/active_record/support/inflector.rb', line 22

def camelize(lower_case_and_underscored_word)
  lower_case_and_underscored_word.to_s.gsub(/(^|_)(.)/){$2.upcase}
end

#classify(table_name) ⇒ Object 



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# File 'lib/active_record/support/inflector.rb', line 38

def classify(table_name)
  camelize(singularize(table_name))
end

#demodulize(class_name_in_module) ⇒ Object 



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# File 'lib/active_record/support/inflector.rb', line 30

def demodulize(class_name_in_module)
  class_name_in_module.to_s.gsub(/^.*::/, '')
end

#foreign_key(class_name, separate_class_name_and_id_with_underscore = true) ⇒ Object 



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# File 'lib/active_record/support/inflector.rb', line 42

def foreign_key(class_name, separate_class_name_and_id_with_underscore = true)
  Inflector.underscore(Inflector.demodulize(class_name)) + 
    (separate_class_name_and_id_with_underscore ? "_id" : "id")
end

#pluralize(word) ⇒ Object 



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# File 'lib/active_record/support/inflector.rb', line 6

def pluralize(word)
  result = word.to_s.dup
  plural_rules.each do |(rule, replacement)|
    break if result.gsub!(rule, replacement)
  end
  return result
end

#singularize(word) ⇒ Object 



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# File 'lib/active_record/support/inflector.rb', line 14

def singularize(word)
  result = word.to_s.dup
  singular_rules.each do |(rule, replacement)|
    break if result.gsub!(rule, replacement)
  end
  return result
end

#tableize(class_name) ⇒ Object 



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# File 'lib/active_record/support/inflector.rb', line 34

def tableize(class_name)
  pluralize(underscore(class_name))
end

#underscore(camel_cased_word) ⇒ Object 



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# File 'lib/active_record/support/inflector.rb', line 26

def underscore(camel_cased_word)
  camel_cased_word.to_s.gsub(/([A-Z]+)([A-Z])/,'\1_\2').gsub(/([a-z])([A-Z])/,'\1_\2').downcase
end